The demo has been updated! It includes a significant change regarding the control scheme, which is based on numerous feedback submissions. It should now be more intuitive and require less switching around when you want to flip tiles while having a unit selected. Full changelog:

• Changed control scheme: Left click: Select seeker, turn grid squares on/off. Right click: Send selected seeker to target destination.
• Added sound and particle effect to last remaining crystal on the grid
• Endless Mode: Add random music every ten levels (this is temporary until it gets its own dedicated track)
• Endless Mode: Changed transition sprites to only show "inside" the board borders
• Endless Mode: Add new creator variant with rotating projectiles every 10 levels
• Creators now show when and where they will shoot next (they start glowing in the direction they're going to shoot at, and animate one full circle)
• Broken seekers (those walking around randomly) now think for 1-2 seconds every 2 steps, this should make them easier to catch
• Fixed bug where if you have seeker #1 selected and repair seeker #2 dies, you weren't able to command seeker #1 around anymore